http://blogs.technet.com/peterfi/archive/2007/07/11/scvmm-licencing-information-now-available.aspxSystem Center Virtual Machine Manager (SCVMM) will be licensed as part of the Enterprise Edition of the System Management License (SML). You can read more about System Center licensing at http://www.microsoft.com/systemcenter/howtobuy/faq.mspx The Enterpriseen-USCommunityServer 2.1 SP1 (Build: 61025.2)